draw·back /ˈdrɔˌbæk/
 不利點,退稅


 Draw·back n.
 1. A loss of advantage, or deduction from profit, value, success, etc.; a discouragement or hindrance; objectionable feature.
    The avarice of Henry VII . . . . must be deemed a drawback from the wisdom ascribed to him.   --Hallam.
 2. Com. Money paid back or remitted; especially, a certain amount of duties or customs, sometimes the whole, and sometimes only a part, remitted or paid back by the government, on the exportation of the commodities on which they were levied.

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 drawback
      n : the quality of being a hindrance; "he pointed out all the
          drawbacks to my plan"